Managing a Hybrid HA Environment

In the previous chapter, we created a basic scalable GitLab architecture using Terraform and Ansible. In this chapter, we will continue with the same structure, but we will change some things and create even more resiliency. One of the weak points of the architecture we first designed was that the frontend servers had more than one GitLab component installed, which could prove to be a problem if one component breaks down. We will run the Sidekiq component on another server to mitigate this risk. Another weakness was the shared filesystem. Network File System (NFS) is known to have some performance and file-locking problems; GitLab has developed Gitaly as a replacement, and we will install it in this chapter. Another issue is that there was no monitoring available in the basic scalable architecture. We will install that in this chapter as well.

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